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.Dd June 28, 2021
.Dt VN_ISDISK 9
.Os
.Sh NAME
.Nm vn_isdisk
.Nd "checks if a vnode represents a disk"
.Sh SYNOPSIS
.In sys/param.h
.In sys/vnode.h
.Ft bool
.Fn vn_isdisk "struct vnode *vp"
.Ft bool
.Fn vn_isdisk_error "struct vnode *vp" "int *errp"
.Sh DESCRIPTION
The
.Fn vn_isdisk
and
.Fn vn_isdisk_error
functions check to see if
.Fa vp
represents a disk.
In order for
.Fa vp
to be a disk,
it must be a character device,
.Va v_rdev
must be valid, and the
.Vt cdevsw
entry's
.Va flags
must have
.Dv D_DISK
set.
.Pp
The arguments are:
.Bl -tag -width ".Fa errp"
.It Fa vp
The vnode to check.
.It Fa errp
An integer pointer to store the error number in if the call fails.
.El
.Sh RETURN VALUES
If the vnode represents a disk, true is returned; otherwise, false
is returned and
.Fa errp
will contain the error number.
.Sh AUTHORS
This manual page was written by
.An Chad David Aq Mt davidc@acns.ab.ca .
